Hello Daneila and welcome to HCM
Pain under the arm and breast pain
which is cyclic and occurs during menstruation.
This kind of pain is associated with a condition known as 'Fibroadenosis'.
This is ahormone responsive condition in which there is cystic change and fibrotic change in the braest parenchyma.
This change in the breast causes lumpiness in the breast and associated pain during menstruation
This is benign condition and requires hormonal
) and topical application of oil of primrose.
The post surgical pain will clear away time. You need not worry much for that.
Since, you have hyperprolactinoma, you can face the problem of whitish discharge from your nipples.
However, you will not face this problem once the condition is weel controlled.
Thanks and take care
Dr Shailja P wahal